JPH01107378A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To accurately reproduce recording data irrespective of the kind and quality of a recording medium by previously recording an alternate reference corresponding to the kind of the recording medium and the quality of a recording film into the recording medium. CONSTITUTION:The eight tracks of an optical disk 20 consists of a user sector group 20 where data or the like is recorded by a user and an alternate sector group 20B which is a stand-by recording area when there is a fault in the area of the user sector group 20. An outer peripheral track group is set into a system track group 21 into which various control information of a recording reproducing device are written. The alternate reference which is previously recorded in the system track group 21a of the optical disk 20 is read in accordance with the kind of the optical disk 20 and the quality of the recording film and an alternate processing is executed in correspondence with the read alternate reference. Thus, recording data can accurately be reproduced hereafter.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a recording/reproducing apparatus used in an optical disk device or the like that drives an optical disk having a spare area such as a spare sector.

2. Description of the Related Art In general, a recording medium such as an optical disk has a recording area configured as a spiral or concentric track, and this track is divided into a plurality of sectors in the radial direction.

Furthermore, since the recording film of recording media such as optical disks is not uniform due to manufacturing defects or handling during use, a recording/reproducing device records data and then reproduces this data to create a predetermined reproduction data. If the number of errors (replacement standard) or more occurs, the same data is recorded again in a replacement sector or track that serves as a backup recording area (replacement process), so that the recorded data can be played back correctly at a later date. .

That is, the replacement standard is a limit standard that prevents correct reproduction of recorded data depending on the type and quality of the recording medium.

FIG. 4(a) shows an optical disc 1 of relatively good quality, and FIG. 4(b) shows an optical disc 2 of relatively poor quality.

As shown in FIG. 4, an optical disc 1 of relatively good quality has a replacement sector group IB of a relatively small area set in advance, and an optical disc 2 of relatively poor quality has a replacement sector group IB of a relatively large area set in advance. Group 2B is set.

When recording data on an optical disc 1 of relatively good quality, an optical disc device in which a program with a relatively low replacement standard has been set in advance first records the user sector group I of the optical disc 1.
If more errors occur than the replacement standard when reproducing this recorded data, the same data is recorded again in the replacement sector group IB.

On the other hand, when recording data on an optical disc 2 of relatively poor quality, an optical disc device in which a program with a relatively high replacement standard has been set in advance first records data in the user sector group 2A of the optical disc 2, and then records this recorded data in the user sector group 2A of the optical disc 2. If more errors than this replacement standard occur during reproduction, the same data is written again into the replacement sector group 2B.

In other words, each recording/reproducing device has an optical disc 1.
, 2 is determined whether or not to record data in the replacement sector groups IB and 2B, and replacement processing is performed so that the recorded data can be correctly reproduced at a later date.

Problems to be Solved by the Invention However, with the above-mentioned conventional recording and reproducing apparatus, as shown in FIG.
The device that performs playback can correctly play back the data on the optical disc 1, which has relatively good quality, at a later date;
As shown in Figure (a), an apparatus for recording and reproducing data from an optical disc 1 of relatively good quality has a problem in that it cannot later correctly reproduce data from an optical disc 2 of relatively poor quality.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a versatile recording and reproducing apparatus that can correctly reproduce recorded data regardless of the type and quality of the recording medium.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention records in advance on a recording medium a replacement standard that cannot be reproduced correctly when recorded data is reproduced, and the data is stored in the user data area. When the same data is recorded in the replacement area of the recording medium, the same data is recorded in the replacement area of the recording medium according to the replacement criteria recorded on the recording medium.

Effects of the present invention In order to pre-record a replacement standard in accordance with the type of recording medium and the quality of the recording film on the recording medium, it becomes possible for the recording/reproducing device to perform data replacement processing based on this replacement standard. Therefore, it is possible to realize a versatile recording and reproducing device that can correctly reproduce recorded data regardless of the type and quality of the recording medium.

Example The present invention will now be described in detail with reference to the drawings.

FIG. 1 is a schematic block diagram showing one embodiment of a recording/reproducing apparatus according to the present invention, FIG. 2 is an explanatory diagram of an optical disc on which data is recorded and reproduced by the recording/reproducing apparatus of FIG. 1, and FIG.
The figure is an explanatory diagram of system data recorded on the optical disc of FIG. 2.

In FIG. 1, 11 is an input unit for inputting data to be recorded on the optical disc 20 and various commands, and 12 is a unit for inputting data to be recorded on the optical disc 20 and various commands inputted through the input unit 11, and input unit 12 for inputting data to be recorded on the optical disc 20 and various commands inputted through the input unit 11, processed by the CPU 13. 13 is a CPU (Central Processing Unit) that performs operations to be described later; 14 is ROM (Read Only Memory) in which an execution program of the CPU 18 is stored; 15 is recorded on an optical disk 20; It is also a RAM (Random Access Memory) in which data reproduced from the optical disc 20, control information including replacement criteria to be described later, and the like are stored.

Reference numeral 16 denotes a head for writing data, control information, etc. on the optical disk 20 and reading data, control information, etc. written on the optical disk 20, a mechanism for moving this head in the radial direction of the optical disk 20, and a mechanism for moving the head in the radial direction of the optical disk 20. This is a recording and reproducing mechanism that has a rotating mechanism and the like.

In FIG. 2, an optical disk 20 has a recording area consisting of tracks in a spiral or concentric pattern, and this track is divided into eight sectors in the radial direction of the cylindrical optical disk 2° in the drawing. Each is assigned an address.

Note that the number of sectors generally varies depending on the diameter of the optical disc, and in the case of an optical disc with a diameter of 130 ff, 17 sectors are set.

In FIG. 2, the eight tracks of the optical disc 2o are:
User sector group 2O where user data etc. are recorded
A, and a replacement sector group 20B that becomes a spare recording area if there is a defect in the area of the user sector group 2OA, and the outer track group is a system track group 21 in which various control information of the recording/reproducing device is written. is set to .

The total number of sectors, number of user sectors, and number of replacement sectors mentioned above are:
It is constant regardless of the quality of the optical disc 2o.

FIG. 3 shows the recorded contents of one sector 21 & of this system track group 21 (7), which consists of a system data identifier consisting of 16 bytes, system data consisting of 9 bits, and 1 byte. It consists of replacement standards and other control information.

Specifically, the replacement standard is the number of errors in which recorded data cannot be correctly reproduced, and is set and recorded in advance according to the 200 types of optical discs and the quality of the recording film.

Next, the operation of the embodiment according to the above configuration will be described with reference to the optical disc 20.
The case where data etc. are recorded in will be explained.

When the optical disc 20 is set, the CPU 13 drives the recording/reproducing mechanism 16, takes in control information of the system track group 21 of the optical disc 20, and stores it in the RAM 15.

Next, the CPU 13 stores the recording data and its control information input from the input section 11 in the RAM 15K, and records them in the empty area of the user sector group 2OA of the optical disc 20 by driving the recording/reproducing mechanism 16.

After this recording is completed, the CPU 13 reads the recorded data by driving the recording/reproducing mechanism 16, stores it in the RAM 15, and checks whether the data exceeds the replacement standard (number of errors) read from the system track group 21 of the optical disc 20. Discern.

If there are no more than a predetermined number of errors in the read data, the recording process ends; on the other hand, if there are more than a predetermined number of errors, the input data stored in the RAM 15 is transferred to the free area of the replacement sector group 20B of the optical disc 20. to be recorded.

Note that when data is recorded in the replacement sector group 20B, the address of the first recorded user sector group 2OA (replacement source address) is recorded in the replacement sector group 20B.

Therefore, according to the above embodiment, the replacement standard recorded in advance on the system track group 21a of the optical disc 20 is read according to the type of the optical disc 2o and the quality of the recording film.
Since the replacement process is performed according to the read replacement criteria, the recorded data can be correctly reproduced at a later date.

As described in detail, the present invention enables a recording/reproducing device to carry out replacement processing in accordance with the replacement criteria in order to pre-record replacement criteria in accordance with the type of recording medium and the quality of the recording film on the recording medium. Therefore, it is possible to realize a versatile recording and reproducing apparatus that can correctly reproduce recorded data regardless of the type and quality of the recording medium.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing one embodiment of a recording/reproducing apparatus according to the present invention, FIG. 2 is an explanatory diagram of an optical disc on which data is recorded and reproduced by the recording/reproducing apparatus of FIG. 1, and FIG.
The figure is an explanatory diagram of system data recorded on the optical disk of FIG. 2, and FIGS. 4(a) and 4(b) are explanatory diagrams of an optical disc on which data is recorded and reproduced by a conventional recording and reproducing apparatus, respectively. . 13...CPU (central processing unit), 14...RO
M (read only memory), 15...RAM (random access memory), 16...recording and reproducing mechanism, 2
0... Optical disk, 20A... User sector group,
20B: Replacement sector group, 21: System trunk group, 21a: Replacement reference (number of errors) data sector. Name of agent: Patent attorney Toshio Nakao and one other person
1 Figure 2 Figure 3 Figure 4 (b) B

Claims (1)

[Claims] A means for recording data on a recording medium in which a replacement standard of a limit that cannot be reproduced correctly when the recorded data is reproduced in advance, and reproducing the recorded data, and a method for recording data on the recording medium The recording/reproducing means reads the replacement reference, records data in the user data area, reproduces the data, and records the same data in the replacement area of the recording medium when an error in the reproduced data is greater than the replacement reference. A recording/reproducing device having means for controlling.